CI format test

Author: yanovich

.github/format.sh

@@ -0,0 +1,9 @@
+#!/bin/bash -efux
+
+PREFIX=$HOME/opt
+PATH=$PREFIX/bin:$PATH
+
+list=$(git ls-tree --name-only -r HEAD | grep -v ecp_id_.* | grep -v gost_grasshopper_precompiled.c | grep '[.][ch]$')
+clang-format -i $list
+diffLen=$(git diff | wc -l)
+test 0 -eq $diffLen || exit 1